Nondestructive measurement of refractive index profile for holey fiber preforms

Zhao, Yucheng; Lyytikäinen, K.; Eijkelenborg, Martijn A. van; Fleming, Simon

doi:10.1364/oe.11.002474

Cited by 5 publications

(1 citation statement)

References 9 publications

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“…A nondestructive measurement of the two-dimensional refractive index profile for arbitrary preform index distribution without ( I priori knowledge of the preform was proposed by using the tomography method [SI. A non-destructive method for measuring the profile of a Holey Fibre Preform (HFP) was proposed by using two types of matching oil [6]. This paper presents a new method by which the deflection data can be used to reconstruct a two-dimensional refractive index profile with weakly varying, arbitrary index distribution.…”

Section: Introductionmentioning

confidence: 99%

Tomographic reconstruction for arbitrary refractive index distribution of optical fibre preforms

Zhao

Fleming

Lyytikäinen

et al. 2004

Technical Digest: Symposium on Optical Fiber Measurements, 2004.

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We demonstrate a tomographic method to measure arbitrary refractive index profiles of silica and polymer optical preforms. The preform is rotated through 180 degrees and the deflection angle data collected, then the back projection technique and spline interpolation algorithm are used in the computed tomographic two-dimensional profile distribution. An improved formula for calculating the optical path length from the deflection function is derived. To minimize the computing time, the spatial Nyquist frequency is used to estimate the angle sampling number of views and the numbers of points per scan in advance.

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Section: Introductionmentioning

confidence: 99%